Improvement in by-passes for gas-works



UNITED STATES PATENT OFFI'oE. Q

PETER MUNZINGER, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN BY-PASSES FOR GAS-WORKS Specification forming part of Letters Patent No. 144.408, dated November 11', 1873; application filed September 16, 1873.

To all whom it may concern:

Be it known that I, PETER MUNZINGER, of the city and county of Philadelphia and State of Pennsylvania, have invented an Improvement in By-Passes for Gas-Works, of which the following is a specification The invention is for correcting any inaccuracies in the working of the exhauster used for pumping the gas from the retorts. It consists of an automatically-actmg valve placed in the shut-oft or valve of the by-pass.

Figs. 1 and 2 are vertical, diametrical, and opposite sections of a by-pass. Fig. 3 is a top view. Fig. 4 is a plan view, showing the arrangement of the exhauster, by-pass, and the pipes for taking the gas from the retorts and conducting it to the gas-holder.

A is a bypass, on the valve-box B of which is a valve-box, 0, containing an automaticallyworking valve, D, which closes against a jambstrip, b, as shown. It is of the kind known as a fly or flap valve. By suitable inlet and outlet openings 0 the two valve-chambers are made communicating. As shown at Fig. 4, E are pipes from the retorts to the exhauster F. G are pipes from the exhauster to the gas-holder. A is theby-pass between the pipes E G, with which it is connected by means of the crosspipes J K. The gas is pumped by the exhauster through the pipes E, and forced by the same through the pipes G to the gas-holder, to relieve the retorts from accumulated resistances and pressures.

The by-pass A is set to prevent the flow of gas between the pipes E G, except through the opening of the automatic valve D. The gas, while being forced through the pipe G to the gas-holder, fills the pipe J and the by-pass. Its pressure against the valve D holds it firm against the jamb-strip b, and thereby effectually prevents the return of the gas to the retorts.

If the exhauster should become disarranged in any of its parts and unable to pump the gas from theretorts, the accumulation of the pipes E will flow throughthe pipes Kinto the by-pass and press open the valve D, and thus escape the gas through the bypass and the pipes J G to the gas-holder.

I do not confine myself to the valve-box G and the automatic valve D constructed and arranged with reference to the by-pass, knowing that valves of other construction can be used to produce the same result. I do not confine myself to a by-pass constructed as shown; but

I claim as my invention- A by-pass in combination with an automatic valve, arranged to close when the pressure of the gas in the forcing-pipes G exceeds the pressure in the suction-pipes E,-and to open when the pressure of the gas in the suctionpipes E exceeds that in the forcing-pipes G, for the purpose shown. and described.

In testimony whereof I hereunto sign my name in presence of two subscribing witnesses.

PETER 'MUNZINGEE.

Witnesses:

THOS. G. WARWICK, FRANCIS D. PASTOR-IUS. 

